Using the same organocatalyst for asymmetric synthesis of both enantiomers of glutamic acid-derived Ni(II) complexes via 1,4-additions of achiral glycine and dehydroalanine Schiff base Ni(II) complexes

摘要

(S)- and (R)-BIMBOL were efficient PT catalysts of asymmetric Michael addition of prochiral Ni–PBP–Gly (1) to acrylic esters and malonic esters to Ni–PBP–Δ-Ala (2) correspondingly. The salient feature of the catalysis is opposite configurations of Glu prepared via the two paths with BIMBOL of the same configuration and a perspective novel catalytic procedure for the synthesis of Gla derivatives.